Honeywell AT150A1007 Transformer

The Honeywell AT150A1007 Transformer is a heavy-duty, 50VA rated solution engineered for powering 24 VAC circuits within commercial and residential HVAC control systems. This multi-tap step-down transformer features primary voltage inputs for 120, 208, and 240 VAC, making it a versatile Honeywell transformer replacement for various field applications. Designed for systems with predictable, uniform loads, the AT150A1007 delivers a consistent 27.5 V.O.C. secondary output to ensure stable operation of thermostats, zone valves, and relays.

For technicians at the job site, the AT150A1007 installation is streamlined via a universal mounting configuration. The unit supports foot mounting, plate mounting on 2x4 inch or 4x4 inch outlet boxes, or clamp mounting through an outlet box knockout. Built with metal end bells for added durability, it includes 9-inch color-coded primary lead wires and screw terminals on the secondary side for secure low voltage transformer wiring. This Class 2 rated component is UL 1585 listed and operates reliably across a temperature range of -20°F to 105°F.

• Multi-Voltage Primary: Supports 120V, 208V, and 240V inputs for maximum compatibility with different power supplies.
• Universal Mounting Options: Flexible foot, plate, panel, or clamp mounting allows for quick integration into various HVACR equipment.
• High Power Capacity: 50 VA rating provides ample overhead for multi-zone systems and heavy-duty contactors.
• Technical Reliability: Features metal end bells and color-coded lead wires to withstand demanding mechanical environments.

What is the difference between the AT150A1007 and a standard 40VA transformer?
The 50VA rating of the AT150A1007 provides more current capacity, making it suitable for systems with more peripherals, such as multiple zone valves or large contactors, where a 40VA unit might overheat or fail.

Can this transformer be used in 277V applications?
No, the AT150A1007 is specifically rated for 120/208/240 VAC primary inputs. For 277V or 480V requirements, an AT150F series model should be used instead.

Is this transformer suitable for wet locations?
It is identified as NEC Class 2 "not wet" and Class 3 "wet" depending on the specific installation environment; however, professional practice dictates it should be housed within a NEMA-rated enclosure if exposed to moisture.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.